Is FastDDS v2.14.1 backwards compatible with FastDDS v2.1.4?

[gstangel]

Hi there, this is a general question about backwards compatibility. I am developing a distributed system based around ROS2 Foxy, which uses FastDDS v2.1.4 under the hood. I would like to leverage some newer features in v2.14.1, like the ability to launch a discovery server from a XML file, so I built FastDDS from source. I an unable to get the Discovery Server, running on v2.14.1, working with the ROS2 Foxy Nodes, running v2.1.4. I was wondering if anyone would be able to point me in a direction that would define what versions of FastDDS are compatible with each other. I am able to get the Discovery Server working when it is running at the same version as the ROS2 Foxy Nodes (v2.1.4).

Thanks!

[Mario-DL]

Hi @gstangel,
Thanks for using Fast DDS. In general terms we cannot guarantee that the behavior and ABI of v2.14.1 is compatible with v2.1.4 (that was deprecated a year ago) in all its features, what we can assure is that there is no API breaks within these two (VERSIONING).

Anyways, please ensure that the client and server settings are correct (address, port and index). For further documentation you can refer to (Discovery Server)